I have a bottle of flourish comprehensive I have had since about the summer of 2011 when I had my 50 gallon planted. I have kept the bottle in the fridge since I had bought it, remember reading on here sometime back about doing that. Still have about half a bottle left and wondering if it could still be used? Looked on the bottle and did not see any type of shelf life printed on the bottle out label. Thanks

The aquarist is one who must learn the ways of the biologist, the chemist, and the veterinarian.[unknown source]

Something we all need to remember: The fish you've acquired was quite happy not being owned by you, minding its own business. If you’re going to take it under your wing then you’re responsible for it. Every aspect of its life is under your control, from water quality and temperature to swimming space. [Nathan Hill in PFK]

I have a bottle of flourish comprehensive I have had since about the summer of 2011 when I had my 50 gallon planted. I have kept the bottle in the fridge since I had bought it, remember reading on here sometime back about doing that. Still have about half a bottle left and wondering if it could still be used? Looked on the bottle and did not see any type of shelf life printed on the bottle out label. Thanks

i hear ya about getting back into the game, ive been that way since i could remember as far as fish go. only ask cause im soon going to need plenty of this stuff on hand. best to keep it in the fridge when not in use also?

On the label Seachem suggest refrigeration. One (or more) of our members have questioned this with Seachem, and been told that it really doesn't matter. I see it now says on their website, "Refrigeration after opening is recommended but not required." This sort of annoys me; there must be a reason why they recommend refrigeration.

Edit. I do the same as Boredomb, except I keep mine in the wine fridge which is cool but not as cold as the main fridge. I tend to use two 2 liter jugs a year, roughly, so that means they are in the fridge after opening for 6-8 months.

The aquarist is one who must learn the ways of the biologist, the chemist, and the veterinarian.[unknown source]

Something we all need to remember: The fish you've acquired was quite happy not being owned by you, minding its own business. If you’re going to take it under your wing then you’re responsible for it. Every aspect of its life is under your control, from water quality and temperature to swimming space. [Nathan Hill in PFK]

I've been wondering this myself lately. . .I've had the same bottle for a bit over a year now, and my plants are still growing, so it still seems to be working well enough. It seems like the kind of thing that you'd want to replace every year, regardless, but there isn't an expiration date, so. . .*shrugs* I've also kept mine in the 'fridge for no other reason than thats what the bottle told me to do, lol. Like Byron said, there must have been a reason for them to have originally recommended it. . .

Anyway, I've sent a message to the company to see what their recommendation is, I'll let you know when I hear back.